label{
    display: flex;
    align-items: center;
    justify-content: center;
}
input[type=checkbox]{
    display: none;
}
input[type=checkbox]+em i{
    display: none;
}
input[type=checkbox]:checked+em i{
    display: inline-block;
}
em{
    width: .733333rem;
    height: .733333rem;
    border: 1px solid #297CD5;
    position: relative;
}
i{
    width: .266667rem;
    height: .533333rem;
    display: inline-block;
    border-right: 1px solid #297CD5;
    border-bottom: 1px solid #297CD5;
    transform: rotate(45deg);
    position: absolute;
    left: 50%;
    top: 50%;
    margin: -0.366667rem -0.133333rem;
}